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						<h1>Source for file math.php</h1>
<p>Documentation is available at <a href="../Dwoo/_plugins---builtin---functions---math.php.html">math.php</a></p>
<div class="src-code">
<div class="src-code"><ol><li><div class="src-line"><a name="a1"></a><span class="src-php">&lt;?php</span></div></li>
<li><div class="src-line"><a name="a2"></a>&nbsp;</div></li>
<li><div class="src-line"><a name="a3"></a><span class="src-doc">/**</span></div></li>
<li><div class="src-line"><a name="a4"></a><span class="src-doc">&nbsp;*&nbsp;Computes&nbsp;a&nbsp;mathematical&nbsp;equation</span></div></li>
<li><div class="src-line"><a name="a5"></a><span class="src-doc">&nbsp;*&nbsp;&lt;pre&gt;</span></div></li>
<li><div class="src-line"><a name="a6"></a><span class="src-doc">&nbsp;*&nbsp;&nbsp;*&nbsp;equation&nbsp;:&nbsp;the&nbsp;equation&nbsp;to&nbsp;compute,&nbsp;it&nbsp;can&nbsp;include&nbsp;normal&nbsp;variables&nbsp;with&nbsp;$foo&nbsp;or&nbsp;special&nbsp;math&nbsp;variables&nbsp;without&nbsp;the&nbsp;dollar&nbsp;sign</span></div></li>
<li><div class="src-line"><a name="a7"></a><span class="src-doc">&nbsp;*&nbsp;&nbsp;*&nbsp;format&nbsp;:&nbsp;output&nbsp;format,&nbsp;see&nbsp;</span><span class="src-doc-inlinetag">{@link&nbsp;http://php.net/sprintf}</span><span class="src-doc">&nbsp;for&nbsp;details</span></div></li>
<li><div class="src-line"><a name="a8"></a><span class="src-doc">&nbsp;*&nbsp;&nbsp;*&nbsp;assign&nbsp;:&nbsp;if&nbsp;set,&nbsp;the&nbsp;output&nbsp;is&nbsp;assigned&nbsp;into&nbsp;the&nbsp;given&nbsp;variable&nbsp;name&nbsp;instead&nbsp;of&nbsp;being&nbsp;output</span></div></li>
<li><div class="src-line"><a name="a9"></a><span class="src-doc">&nbsp;*&nbsp;&nbsp;*&nbsp;rest&nbsp;:&nbsp;all&nbsp;math&nbsp;specific&nbsp;variables&nbsp;that&nbsp;you&nbsp;use&nbsp;must&nbsp;be&nbsp;defined,&nbsp;see&nbsp;the&nbsp;example</span></div></li>
<li><div class="src-line"><a name="a10"></a><span class="src-doc">&nbsp;*&nbsp;&lt;/pre&gt;</span></div></li>
<li><div class="src-line"><a name="a11"></a><span class="src-doc">&nbsp;*&nbsp;Example&nbsp;:</span></div></li>
<li><div class="src-line"><a name="a12"></a><span class="src-doc">&nbsp;*</span></div></li>
<li><div class="src-line"><a name="a13"></a><span class="src-doc">&nbsp;*&nbsp;&lt;code&gt;</span></div></li>
<li><div class="src-line"><a name="a14"></a><span class="src-doc">&nbsp;*&nbsp;{$c=2}</span></div></li>
<li><div class="src-line"><a name="a15"></a><span class="src-doc">&nbsp;*&nbsp;{math&nbsp;&quot;(a+b)*$c/4&quot;&nbsp;a=3&nbsp;b=5}</span></div></li>
<li><div class="src-line"><a name="a16"></a><span class="src-doc">&nbsp;*</span></div></li>
<li><div class="src-line"><a name="a17"></a><span class="src-doc">&nbsp;*&nbsp;output&nbsp;is&nbsp;:&nbsp;4&nbsp;(&nbsp;=&nbsp;(3+5)*2/4)</span></div></li>
<li><div class="src-line"><a name="a18"></a><span class="src-doc">&nbsp;*&nbsp;&lt;/code&gt;</span></div></li>
<li><div class="src-line"><a name="a19"></a><span class="src-doc">&nbsp;*</span></div></li>
<li><div class="src-line"><a name="a20"></a><span class="src-doc">&nbsp;*&nbsp;This&nbsp;software&nbsp;is&nbsp;provided&nbsp;'as-is',&nbsp;without&nbsp;any&nbsp;express&nbsp;or&nbsp;implied&nbsp;warranty.</span></div></li>
<li><div class="src-line"><a name="a21"></a><span class="src-doc">&nbsp;*&nbsp;In&nbsp;no&nbsp;event&nbsp;will&nbsp;the&nbsp;authors&nbsp;be&nbsp;held&nbsp;liable&nbsp;for&nbsp;any&nbsp;damages&nbsp;arising&nbsp;from&nbsp;the&nbsp;use&nbsp;of&nbsp;this&nbsp;software.</span></div></li>
<li><div class="src-line"><a name="a22"></a><span class="src-doc">&nbsp;*</span></div></li>
<li><div class="src-line"><a name="a23"></a><span class="src-doc">&nbsp;*&nbsp;This&nbsp;file&nbsp;is&nbsp;released&nbsp;under&nbsp;the&nbsp;LGPL</span></div></li>
<li><div class="src-line"><a name="a24"></a><span class="src-doc">&nbsp;*&nbsp;&quot;GNU&nbsp;Lesser&nbsp;General&nbsp;Public&nbsp;License&quot;</span></div></li>
<li><div class="src-line"><a name="a25"></a><span class="src-doc">&nbsp;*&nbsp;More&nbsp;information&nbsp;can&nbsp;be&nbsp;found&nbsp;here:</span></div></li>
<li><div class="src-line"><a name="a26"></a><span class="src-doc">&nbsp;*&nbsp;</span><span class="src-doc-inlinetag">{@link&nbsp;http://www.gnu.org/copyleft/lesser.html}</span></div></li>
<li><div class="src-line"><a name="a27"></a><span class="src-doc">&nbsp;*</span></div></li>
<li><div class="src-line"><a name="a28"></a><span class="src-doc">&nbsp;*&nbsp;</span><span class="src-doc-coretag">@author</span><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Jordi&nbsp;Boggiano&nbsp;&lt;j.boggiano@seld.be&gt;</span></div></li>
<li><div class="src-line"><a name="a29"></a><span class="src-doc">&nbsp;*&nbsp;</span><span class="src-doc-coretag">@copyright</span><span class="src-doc">&nbsp;&nbsp;Copyright&nbsp;(c)&nbsp;2008,&nbsp;Jordi&nbsp;Boggiano</span></div></li>
<li><div class="src-line"><a name="a30"></a><span class="src-doc">&nbsp;*&nbsp;</span><span class="src-doc-coretag">@license</span><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;http://www.gnu.org/copyleft/lesser.html&nbsp;&nbsp;GNU&nbsp;Lesser&nbsp;General&nbsp;Public&nbsp;License</span></div></li>
<li><div class="src-line"><a name="a31"></a><span class="src-doc">&nbsp;*&nbsp;</span><span class="src-doc-coretag">@link</span><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;http://dwoo.org/</span></div></li>
<li><div class="src-line"><a name="a32"></a><span class="src-doc">&nbsp;*&nbsp;</span><span class="src-doc-coretag">@version</span><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;0.9.1</span></div></li>
<li><div class="src-line"><a name="a33"></a><span class="src-doc">&nbsp;*&nbsp;</span><span class="src-doc-tag">@date</span><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2008-05-30</span></div></li>
<li><div class="src-line"><a name="a34"></a><span class="src-doc">&nbsp;*&nbsp;</span><span class="src-doc-coretag">@package</span><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;Dwoo</span></div></li>
<li><div class="src-line"><a name="a35"></a><span class="src-doc">&nbsp;*/</span></div></li>
<li><div class="src-line"><a name="a36"></a><span class="src-key">function&nbsp;</span><a href="../Dwoo/_plugins---builtin---functions---math.php.html#functionDwoo_Plugin_math_compile">Dwoo_Plugin_math_compile</a><span class="src-sym">(</span><span class="src-id">Dwoo_Compiler&nbsp;</span><span class="src-var">$compiler</span><span class="src-sym">,&nbsp;</span><span class="src-var">$equation</span><span class="src-sym">,&nbsp;</span><span class="src-var">$format</span>=<span class="src-str">''</span><span class="src-sym">,&nbsp;</span><span class="src-var">$assign</span>=<span class="src-str">''</span><span class="src-sym">,&nbsp;</span><span class="src-key">array&nbsp;</span><span class="src-var">$rest</span>=<span class="src-key">array</span><span class="src-sym">(</span><span class="src-sym">))</span></div></li>
<li><div class="src-line"><a name="a37"></a><span class="src-sym">{</span></div></li>
<li><div class="src-line"><a name="a38"></a>&nbsp;&nbsp;&nbsp;&nbsp;/**</div></li>
<li><div class="src-line"><a name="a39"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;Holds&nbsp;the&nbsp;allowed&nbsp;function,&nbsp;characters,&nbsp;operators&nbsp;and&nbsp;constants</div></li>
<li><div class="src-line"><a name="a40"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*/</div></li>
<li><div class="src-line"><a name="a41"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$allowed&nbsp;</span>=&nbsp;<span class="src-key">array</span></div></li>
<li><div class="src-line"><a name="a42"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-sym">(</span></div></li>
<li><div class="src-line"><a name="a43"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-str">'0'</span><span class="src-sym">,&nbsp;</span><span class="src-str">'1'</span><span class="src-sym">,&nbsp;</span><span class="src-str">'2'</span><span class="src-sym">,&nbsp;</span><span class="src-str">'3'</span><span class="src-sym">,&nbsp;</span><span class="src-str">'4'</span><span class="src-sym">,&nbsp;</span><span class="src-str">'5'</span><span class="src-sym">,&nbsp;</span><span class="src-str">'6'</span><span class="src-sym">,&nbsp;</span><span class="src-str">'7'</span><span class="src-sym">,&nbsp;</span><span class="src-str">'8'</span><span class="src-sym">,&nbsp;</span><span class="src-str">'9'</span><span class="src-sym">,</span></div></li>
<li><div class="src-line"><a name="a44"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-str">'+'</span><span class="src-sym">,&nbsp;</span><span class="src-str">'-'</span><span class="src-sym">,&nbsp;</span><span class="src-str">'/'</span><span class="src-sym">,&nbsp;</span><span class="src-str">'*'</span><span class="src-sym">,&nbsp;</span><span class="src-str">'.'</span><span class="src-sym">,&nbsp;</span><span class="src-str">'&nbsp;'</span><span class="src-sym">,&nbsp;</span><span class="src-str">'&lt;&lt;'</span><span class="src-sym">,&nbsp;</span><span class="src-str">'&gt;&gt;'</span><span class="src-sym">,&nbsp;</span><span class="src-str">'%'</span><span class="src-sym">,&nbsp;</span><span class="src-str">'&amp;'</span><span class="src-sym">,&nbsp;</span><span class="src-str">'^'</span><span class="src-sym">,&nbsp;</span><span class="src-str">'|'</span><span class="src-sym">,&nbsp;</span><span class="src-str">'~'</span><span class="src-sym">,</span></div></li>
<li><div class="src-line"><a name="a45"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-str">'abs('</span><span class="src-sym">,&nbsp;</span><span class="src-str">'ceil('</span><span class="src-sym">,&nbsp;</span><span class="src-str">'floor('</span><span class="src-sym">,&nbsp;</span><span class="src-str">'exp('</span><span class="src-sym">,&nbsp;</span><span class="src-str">'log10('</span><span class="src-sym">,</span></div></li>
<li><div class="src-line"><a name="a46"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-str">'cos('</span><span class="src-sym">,&nbsp;</span><span class="src-str">'sin('</span><span class="src-sym">,&nbsp;</span><span class="src-str">'sqrt('</span><span class="src-sym">,&nbsp;</span><span class="src-str">'tan('</span><span class="src-sym">,</span></div></li>
<li><div class="src-line"><a name="a47"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-str">'M_PI'</span><span class="src-sym">,&nbsp;</span><span class="src-str">'INF'</span><span class="src-sym">,&nbsp;</span><span class="src-str">'M_E'</span><span class="src-sym">,</span></div></li>
<li><div class="src-line"><a name="a48"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-sym">)</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a49"></a>&nbsp;</div></li>
<li><div class="src-line"><a name="a50"></a>&nbsp;&nbsp;&nbsp;&nbsp;/**</div></li>
<li><div class="src-line"><a name="a51"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;Holds&nbsp;the&nbsp;functions&nbsp;that&nbsp;can&nbsp;accept&nbsp;multiple&nbsp;arguments</div></li>
<li><div class="src-line"><a name="a52"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*/</div></li>
<li><div class="src-line"><a name="a53"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$funcs&nbsp;</span>=&nbsp;<span class="src-key">array</span></div></li>
<li><div class="src-line"><a name="a54"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-sym">(</span></div></li>
<li><div class="src-line"><a name="a55"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-str">'round('</span><span class="src-sym">,&nbsp;</span><span class="src-str">'log('</span><span class="src-sym">,&nbsp;</span><span class="src-str">'pow('</span><span class="src-sym">,</span></div></li>
<li><div class="src-line"><a name="a56"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-str">'max('</span><span class="src-sym">,&nbsp;</span><span class="src-str">'min('</span><span class="src-sym">,&nbsp;</span><span class="src-str">'rand('</span><span class="src-sym">,</span></div></li>
<li><div class="src-line"><a name="a57"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-sym">)</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a58"></a>&nbsp;</div></li>
<li><div class="src-line"><a name="a59"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$equation&nbsp;</span>=&nbsp;<span class="src-var">$equationSrc&nbsp;</span>=&nbsp;<a href="http://www.php.net/str_ireplace">str_ireplace</a><span class="src-sym">(</span><span class="src-key">array</span><span class="src-sym">(</span><span class="src-str">'pi'</span><span class="src-sym">,&nbsp;</span><span class="src-str">'M_PI()'</span><span class="src-sym">,&nbsp;</span><span class="src-str">'inf'</span><span class="src-sym">,&nbsp;</span><span class="src-str">'&nbsp;e&nbsp;'</span><span class="src-sym">)</span><span class="src-sym">,&nbsp;</span><span class="src-key">array</span><span class="src-sym">(</span><span class="src-str">'M_PI'</span><span class="src-sym">,&nbsp;</span><span class="src-str">'M_PI'</span><span class="src-sym">,&nbsp;</span><span class="src-str">'INF'</span><span class="src-sym">,&nbsp;</span><span class="src-str">'&nbsp;M_E&nbsp;'</span><span class="src-sym">)</span><span class="src-sym">,&nbsp;</span><span class="src-var">$equation</span><span class="src-sym">)</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a60"></a>&nbsp;</div></li>
<li><div class="src-line"><a name="a61"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$delim&nbsp;</span>=&nbsp;<span class="src-var">$equation</span><span class="src-sym">[</span><span class="src-num">0</span><span class="src-sym">]</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a62"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$open&nbsp;</span>=&nbsp;<span class="src-var">$delim</span>.<span class="src-str">'.'</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a63"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$close&nbsp;</span>=&nbsp;<span class="src-str">'.'</span>.<span class="src-var">$delim</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a64"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$equation&nbsp;</span>=&nbsp;<a href="http://www.php.net/substr">substr</a><span class="src-sym">(</span><span class="src-var">$equation</span><span class="src-sym">,&nbsp;</span><span class="src-num">1</span><span class="src-sym">,&nbsp;</span>-<span class="src-num">1</span><span class="src-sym">)</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a65"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$out&nbsp;</span>=&nbsp;<span class="src-str">''</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a66"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$ptr&nbsp;</span>=&nbsp;<span class="src-num">1</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a67"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$allowcomma&nbsp;</span>=&nbsp;<span class="src-num">0</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a68"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">while</span><span class="src-sym">(</span><a href="http://www.php.net/strlen">strlen</a><span class="src-sym">(</span><span class="src-var">$equation</span><span class="src-sym">)&nbsp;</span>&gt;&nbsp;<span class="src-num">0</span><span class="src-sym">)</span></div></li>
<li><div class="src-line"><a name="a69"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-sym">{</span></div></li>
<li><div class="src-line"><a name="a70"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$substr&nbsp;</span>=&nbsp;<a href="http://www.php.net/substr">substr</a><span class="src-sym">(</span><span class="src-var">$equation</span><span class="src-sym">,&nbsp;</span><span class="src-num">0</span><span class="src-sym">,&nbsp;</span><span class="src-var">$ptr</span><span class="src-sym">)</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a71"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-comm">//&nbsp;allowed&nbsp;string</span></div></li>
<li><div class="src-line"><a name="a72"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">if&nbsp;</span><span class="src-sym">(</span><a href="http://www.php.net/array_search">array_search</a><span class="src-sym">(</span><span class="src-var">$substr</span><span class="src-sym">,&nbsp;</span><span class="src-var">$allowed</span><span class="src-sym">)&nbsp;</span>!==&nbsp;<span class="src-id">false</span><span class="src-sym">)&nbsp;</span><span class="src-sym">{</span></div></li>
<li><div class="src-line"><a name="a73"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$out</span>.=<span class="src-var">$substr</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a74"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$equation&nbsp;</span>=&nbsp;<a href="http://www.php.net/substr">substr</a><span class="src-sym">(</span><span class="src-var">$equation</span><span class="src-sym">,&nbsp;</span><span class="src-var">$ptr</span><span class="src-sym">)</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a75"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$ptr&nbsp;</span>=&nbsp;<span class="src-num">0</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a76"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-sym">}</span></div></li>
<li><div class="src-line"><a name="a77"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-comm">//&nbsp;allowed&nbsp;func</span></div></li>
<li><div class="src-line"><a name="a78"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">elseif&nbsp;</span><span class="src-sym">(</span><a href="http://www.php.net/array_search">array_search</a><span class="src-sym">(</span><span class="src-var">$substr</span><span class="src-sym">,&nbsp;</span><span class="src-var">$funcs</span><span class="src-sym">)&nbsp;</span>!==&nbsp;<span class="src-id">false</span><span class="src-sym">)&nbsp;</span><span class="src-sym">{</span></div></li>
<li><div class="src-line"><a name="a79"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$out</span>.=<span class="src-var">$substr</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a80"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$equation&nbsp;</span>=&nbsp;<a href="http://www.php.net/substr">substr</a><span class="src-sym">(</span><span class="src-var">$equation</span><span class="src-sym">,&nbsp;</span><span class="src-var">$ptr</span><span class="src-sym">)</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a81"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$ptr&nbsp;</span>=&nbsp;<span class="src-num">0</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a82"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$allowcomma</span>++<span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a83"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">if</span><span class="src-sym">(</span><span class="src-var">$allowcomma&nbsp;</span>===&nbsp;<span class="src-num">1</span><span class="src-sym">)&nbsp;</span><span class="src-sym">{</span></div></li>
<li><div class="src-line"><a name="a84"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$allowed</span><span class="src-sym">[</span><span class="src-sym">]&nbsp;</span>=&nbsp;<span class="src-str">','</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a85"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-sym">}</span></div></li>
<li><div class="src-line"><a name="a86"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-sym">}</span></div></li>
<li><div class="src-line"><a name="a87"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-comm">//&nbsp;variable</span></div></li>
<li><div class="src-line"><a name="a88"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">elseif</span><span class="src-sym">(</span>isset<span class="src-sym">(</span><span class="src-var">$rest</span><span class="src-sym">[</span><span class="src-var">$substr</span><span class="src-sym">]</span><span class="src-sym">))</span></div></li>
<li><div class="src-line"><a name="a89"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-sym">{</span></div></li>
<li><div class="src-line"><a name="a90"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$out</span>.=<span class="src-var">$rest</span><span class="src-sym">[</span><span class="src-var">$substr</span><span class="src-sym">]</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a91"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$equation&nbsp;</span>=&nbsp;<a href="http://www.php.net/substr">substr</a><span class="src-sym">(</span><span class="src-var">$equation</span><span class="src-sym">,&nbsp;</span><span class="src-var">$ptr</span><span class="src-sym">)</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a92"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$ptr&nbsp;</span>=&nbsp;<span class="src-num">0</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a93"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-sym">}</span></div></li>
<li><div class="src-line"><a name="a94"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-comm">//&nbsp;pre-replaced&nbsp;variable</span></div></li>
<li><div class="src-line"><a name="a95"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">elseif</span><span class="src-sym">(</span><span class="src-var">$substr&nbsp;</span>===&nbsp;<span class="src-var">$open</span><span class="src-sym">)</span></div></li>
<li><div class="src-line"><a name="a96"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-sym">{</span></div></li>
<li><div class="src-line"><a name="a97"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<a href="http://www.php.net/preg_match">preg_match</a><span class="src-sym">(</span><span class="src-str">'#.*\((?:[^()]*?|(?R))\)'</span>.<a href="http://www.php.net/str_replace">str_replace</a><span class="src-sym">(</span><span class="src-str">'.'</span><span class="src-sym">,&nbsp;</span><span class="src-str">'\\.'</span><span class="src-sym">,&nbsp;</span><span class="src-var">$close</span><span class="src-sym">)</span>.<span class="src-str">'#'</span><span class="src-sym">,&nbsp;</span><a href="http://www.php.net/substr">substr</a><span class="src-sym">(</span><span class="src-var">$equation</span><span class="src-sym">,&nbsp;</span><span class="src-num">2</span><span class="src-sym">)</span><span class="src-sym">,&nbsp;</span><span class="src-var">$m</span><span class="src-sym">)</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a98"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">if</span><span class="src-sym">(</span><span class="src-key">empty</span><span class="src-sym">(</span><span class="src-var">$m</span><span class="src-sym">))</span></div></li>
<li><div class="src-line"><a name="a99"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<a href="http://www.php.net/preg_match">preg_match</a><span class="src-sym">(</span><span class="src-str">'#.*?'</span>.<a href="http://www.php.net/str_replace">str_replace</a><span class="src-sym">(</span><span class="src-str">'.'</span><span class="src-sym">,&nbsp;</span><span class="src-str">'\\.'</span><span class="src-sym">,&nbsp;</span><span class="src-var">$close</span><span class="src-sym">)</span>.<span class="src-str">'#'</span><span class="src-sym">,&nbsp;</span><a href="http://www.php.net/substr">substr</a><span class="src-sym">(</span><span class="src-var">$equation</span><span class="src-sym">,&nbsp;</span><span class="src-num">2</span><span class="src-sym">)</span><span class="src-sym">,&nbsp;</span><span class="src-var">$m</span><span class="src-sym">)</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a100"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$out</span>.=<a href="http://www.php.net/substr">substr</a><span class="src-sym">(</span><span class="src-var">$m</span><span class="src-sym">[</span><span class="src-num">0</span><span class="src-sym">]</span><span class="src-sym">,&nbsp;</span><span class="src-num">0</span><span class="src-sym">,&nbsp;</span>-<span class="src-num">2</span><span class="src-sym">)</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a101"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$equation&nbsp;</span>=&nbsp;<a href="http://www.php.net/substr">substr</a><span class="src-sym">(</span><span class="src-var">$equation</span><span class="src-sym">,&nbsp;</span><a href="http://www.php.net/strlen">strlen</a><span class="src-sym">(</span><span class="src-var">$m</span><span class="src-sym">[</span><span class="src-num">0</span><span class="src-sym">]</span><span class="src-sym">)</span>+<span class="src-num">2</span><span class="src-sym">)</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a102"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$ptr&nbsp;</span>=&nbsp;<span class="src-num">0</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a103"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-sym">}</span></div></li>
<li><div class="src-line"><a name="a104"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-comm">//&nbsp;opening&nbsp;parenthesis</span></div></li>
<li><div class="src-line"><a name="a105"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">elseif&nbsp;</span><span class="src-sym">(</span><span class="src-var">$substr</span>===<span class="src-str">'('</span><span class="src-sym">)&nbsp;</span><span class="src-sym">{</span></div></li>
<li><div class="src-line"><a name="a106"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">if</span><span class="src-sym">(</span><span class="src-var">$allowcomma</span>&gt;<span class="src-num">0</span><span class="src-sym">)</span></div></li>
<li><div class="src-line"><a name="a107"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$allowcomma</span>++<span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a108"></a>&nbsp;</div></li>
<li><div class="src-line"><a name="a109"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$out</span>.=<span class="src-var">$substr</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a110"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$equation&nbsp;</span>=&nbsp;<a href="http://www.php.net/substr">substr</a><span class="src-sym">(</span><span class="src-var">$equation</span><span class="src-sym">,&nbsp;</span><span class="src-var">$ptr</span><span class="src-sym">)</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a111"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$ptr&nbsp;</span>=&nbsp;<span class="src-num">0</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a112"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-sym">}</span></div></li>
<li><div class="src-line"><a name="a113"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-comm">//&nbsp;closing&nbsp;parenthesis</span></div></li>
<li><div class="src-line"><a name="a114"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">elseif&nbsp;</span><span class="src-sym">(</span><span class="src-var">$substr</span>===<span class="src-str">')'</span><span class="src-sym">)&nbsp;</span><span class="src-sym">{</span></div></li>
<li><div class="src-line"><a name="a115"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">if</span><span class="src-sym">(</span><span class="src-var">$allowcomma</span>&gt;<span class="src-num">0</span><span class="src-sym">)&nbsp;</span><span class="src-sym">{</span></div></li>
<li><div class="src-line"><a name="a116"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$allowcomma</span>--<span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a117"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">if</span><span class="src-sym">(</span><span class="src-var">$allowcomma</span>===<span class="src-num">0</span><span class="src-sym">)&nbsp;</span><span class="src-sym">{</span></div></li>
<li><div class="src-line"><a name="a118"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<a href="http://www.php.net/array_pop">array_pop</a><span class="src-sym">(</span><span class="src-var">$allowed</span><span class="src-sym">)</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a119"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-sym">}</span></div></li>
<li><div class="src-line"><a name="a120"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-sym">}</span></div></li>
<li><div class="src-line"><a name="a121"></a>&nbsp;</div></li>
<li><div class="src-line"><a name="a122"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$out</span>.=<span class="src-var">$substr</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a123"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$equation&nbsp;</span>=&nbsp;<a href="http://www.php.net/substr">substr</a><span class="src-sym">(</span><span class="src-var">$equation</span><span class="src-sym">,&nbsp;</span><span class="src-var">$ptr</span><span class="src-sym">)</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a124"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$ptr&nbsp;</span>=&nbsp;<span class="src-num">0</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a125"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-sym">}</span></div></li>
<li><div class="src-line"><a name="a126"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-comm">//&nbsp;parse&nbsp;error&nbsp;if&nbsp;we've&nbsp;consumed&nbsp;the&nbsp;entire&nbsp;equation&nbsp;without&nbsp;finding&nbsp;anything&nbsp;valid</span></div></li>
<li><div class="src-line"><a name="a127"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">elseif&nbsp;</span><span class="src-sym">(</span><span class="src-var">$ptr&nbsp;</span>&gt;=&nbsp;<a href="http://www.php.net/strlen">strlen</a><span class="src-sym">(</span><span class="src-var">$equation</span><span class="src-sym">))&nbsp;</span><span class="src-sym">{</span></div></li>
<li><div class="src-line"><a name="a128"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;throw&nbsp;<span class="src-key">new&nbsp;</span><span class="src-id"><a href="../Dwoo/Dwoo_Compilation_Exception.html">Dwoo_Compilation_Exception</a></span><span class="src-sym">(</span><span class="src-str">'Math&nbsp;:&nbsp;Syntax&nbsp;error&nbsp;or&nbsp;variable&nbsp;undefined&nbsp;in&nbsp;equation&nbsp;'</span>.<span class="src-var">$equationSrc</span>.<span class="src-str">'&nbsp;at&nbsp;'</span>.<span class="src-var">$substr</span><span class="src-sym">)</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a129"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">return</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a130"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-sym">}</span></div></li>
<li><div class="src-line"><a name="a131"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">else</span></div></li>
<li><div class="src-line"><a name="a132"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-sym">{</span></div></li>
<li><div class="src-line"><a name="a133"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$ptr</span>++<span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a134"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-sym">}</span></div></li>
<li><div class="src-line"><a name="a135"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-sym">}</span></div></li>
<li><div class="src-line"><a name="a136"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">if</span><span class="src-sym">(</span><span class="src-var">$format&nbsp;</span>!==&nbsp;<span class="src-str">'\'\''</span><span class="src-sym">)</span></div></li>
<li><div class="src-line"><a name="a137"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$out&nbsp;</span>=&nbsp;<span class="src-str">'sprintf('</span>.<span class="src-var">$format</span>.<span class="src-str">',&nbsp;'</span>.<span class="src-var">$out</span>.<span class="src-str">')'</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a138"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">if</span><span class="src-sym">(</span><span class="src-var">$assign&nbsp;</span>!==&nbsp;<span class="src-str">'\'\''</span><span class="src-sym">)</span></div></li>
<li><div class="src-line"><a name="a139"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">return&nbsp;</span><span class="src-str">'($this-&gt;assignInScope('</span>.<span class="src-var">$out</span>.<span class="src-str">',&nbsp;'</span>.<span class="src-var">$assign</span>.<span class="src-str">'))'</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a140"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">return&nbsp;</span><span class="src-str">'('</span>.<span class="src-var">$out</span>.<span class="src-str">')'</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a141"></a><span class="src-sym">}</span></div></li>
</ol></div>
</div>
	<p class="notes" id="credit">
		Documentation generated on Fri, 30 May 2008 04:51:45 +0200 by <a href="http://www.phpdoc.org" target="_blank">phpDocumentor 1.4.0</a>
	</p>
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